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Query: journal id: "physicalxreviewxletters"

AuthorsB. Schmidt, M. Reza Bakhtiari, I. Titvinidze, U. Schneider, M. Snoek, W. Hofstetter
TitleDynamical Arrest of Ultracold Lattice Fermions
JournalPhysical Review Letters
Volume110
Year2013
Pages075302-
ISSN00319007
FacultyFaculty of Science
Institute/dept.FNWI: Institute for Theoretical Physics (ITF)
AbstractWe theoretically investigate the thermodynamics of an interacting inhomogeneous two-component Fermi gas in an optical lattice. Motivated by a recent experiment by L. Hackerm├╝ller et al., Science 327, 1621 (2010), we study the effect of the interplay between thermodynamics and strong correlations on the size of the fermionic cloud. We use dynamical mean-field theory to compute the cloud size, which in the experiment shows an anomalous expansion behavior upon increasing attractive interaction. We confirm this qualitative effect but, assuming adiabaticity, we find quantitative agreement only for weak interactions. For strong interactions we observe significant nonequilibrium effects which we attribute to a dynamical arrest of the particles due to increasing correlations.
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